chore: fix phpstan (#584)

Author: bshaffer

.github/workflows/tests.yml

@@ -35,7 +35,7 @@ jobs:
  - name: Setup PHP
  uses: shivammathur/setup-php@v2
  with:
- php-version: "8.2"
+ php-version: "8.3"
  - name: Run Script
  run: |
  composer global require friendsofphp/php-cs-fixer
@@ -49,9 +49,9 @@ jobs:
  - name: Install PHP
  uses: shivammathur/setup-php@v2
  with:
- php-version: '8.2'
+ php-version: '8.3'
  - name: Run Script
  run: |
  composer install
- composer global require phpstan/phpstan
+ composer global require phpstan/phpstan:~1.10.0
  ~/.composer/vendor/bin/phpstan analyse

src/JWT.php

@@ -204,7 +204,7 @@ public static function encode(
  ?array $head = null
  ): string {
  $header = ['typ' => 'JWT'];
- if (isset($head) && \is_array($head)) {
+ if (isset($head)) {
  $header = \array_merge($header, $head);
  }
  $header['alg'] = $alg;
@@ -387,12 +387,7 @@ public static function jsonDecode(string $input)
  */
  public static function jsonEncode(array $input): string
  {
- if (PHP_VERSION_ID >= 50400) {
- $json = \json_encode($input, \JSON_UNESCAPED_SLASHES);
- } else {
- // PHP 5.3 only
- $json = \json_encode($input);
- }
+ $json = \json_encode($input, \JSON_UNESCAPED_SLASHES);
  if ($errno = \json_last_error()) {
  self::handleJsonError($errno);
  } elseif ($json === 'null') {